【简答题】阅读短文,选择正确答案。 Today my aunt (阿姨) comes to see me. She buys (买) me an ice cream. Ice cream is my favourite dessert. It is delicious. I like it very much. My aunt always (经常) smiles (微笑). She is a lovely...
【简答题】有关 origin of replication 说法 中 正确的是 ( ) 。 A. 线性染色体中的 origin of replication 可以被自主激活,也可以是被动激活; B. 在 S 期,线性染色体需要激活足够多的 origin of replication ; C. 相邻 origin of replication 互补干涉; D. 环形染色体的 origin of repl...